19157297040 has 200 divisors, whose sum is σ = 76041472320. Its totient is φ = 4378800384.

The previous prime is 19157297039. The next prime is 19157297041. The reversal of 19157297040 is 4079275191.

19157297040 is a `hidden beast` number, since 1 + 9 + 1 + 572 + 9 + 70 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (19157297039) and next prime (19157297041).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (19157297041) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 165810 + ... + 256529.

Almost surely, 2^19157297040 is an apocalyptic number.

19157297040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19157297040 is an abundant number, since it is smaller than the sum of its proper divisors (56884175280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19157297040 is a wasteful number, since it uses less digits than its factorization.

19157297040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422371 (or 422356 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The spelling of 19157297040 in words is "nineteen billion, one hundred fifty-seven million, two hundred ninety-seven thousand, forty".